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No. 614,3!2. Patented Nov. I5, |898. H. G. VOIGHT.

PADLOCK.

(Application filed Feb. 24, 1898.)

ma Model.)

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e UNITED STATES PATENT OFFICE.

HENRY G. VOIGHT, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO THE RUSSELL abERWIN MANUFACTURING COMPANY, OF SAME PLACE.

PADLOCK.

SPECIFICATION forming part of Letters Patent No. 614,312, dated November15, 1898.

Application filed February 24, 1898. Serial No. 671,435- (No model.)

To @ZZ wwm it may concern: Y

Be it known that I, HENRY G. VOIGHT, a citizen of theUnited States,residing at New Britain, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements inBicycle-Sprocket Padlocks, of which the following is a specification.

My invention relates to improvements in bicyclessprocket padlocks; andthe objects of my improvement are simplicity and economy in constructionand efficiency in use, especially with reference to security in apadlock of simple construction.

In the accompanying drawings, Figure 1 is a front elevation of mypadlock with half of the case and one ward-plate removed. Fig. 2 isalike view of the same with the tumblers in such a position as theywould have if one should attempt to use a false key. Fig. 3 is anenlarged sectional view of the principal parts on the line of Fig. 1.Fig. 4 is a front View, on a smaller scale'than Fig. 1, of a part of thecase and shackle. Fig. 5 is an inside View of the opposite half of thecase. Fig. 6 is a detached view of the first tumbler;

Fig. 7, a detached View of the adjacent ward-- plate; Fig. 8, a detachedView of the second tumbler; Fig. 9, of the second ward-plate, and Fig.10 of the key. 1

The main portion of the case is formed in two like parts 11 and 12, theflanged body portion of which is of a circular form and is provided witha hollow extension 13, both side ian ges of which extension extend fromthe side iiange of the body portion for receiving and holding theshackle-bracket 14. These two parts of the case are or may be struck upfrom sheet metal. The circular body is of very small diameter for apadlock-case, and the inner walls of its circular sides are made toserve as the bearings in which the circular tumblers revolve and bywhich they are centered. The shackle-bracket may be riveted or otherwisefastened within the extension 13 of the case, which extension when thetwo parts of the case are together embraces the said bracket on all foursides thereof. At the outer end of the bracket 14 I pivot the shackle15, as at 1G, andl provide the shackle- `posite side of the face 25.

joint with a spring which tends to hold the shackle in its openposition, as shown in Fig. 4. There being nothing peculiar to myinvention in a spring-actuated shackle, I consider it unnecessary toillustrate or further describe the said spring. The two parts 11 and 12of the case are partly held together by the studs or posts 17 and 1S.The post 19 may also serve to assist in securing said parts together.The central portion of the case is provided with the usual key-hub 2Ofor a flat key. The tumblers in the main vare of disk form with portionscut away, the central pora tion being cut away sufficiently to allow thetumblers to pass over the hub 20 and also to receive a key for actingupon edge faces of the tumblers. The nose of the shackle is doublybeveled and-provided with lockingshoulders upon opposite sides, theshoulder 21 being for locking the shack-le normally, while the shoulder22 is forlocking the shackle in case a false keyv is attempted to beused. The outer rim of the tumblers, as at 23, engages the shoulder 21of the shackle to lock it within the case, as shown in Fig. 1, while theconfronting end portion 24 of the rim is for engaging the opposingshoulder 22 of the shackle when a false key is used, as shown in Fig. 2.The first tumbler (shown separately in Fig. 6) is provided with a radialedge face 25, which is designed to be acted upon by the fiat side of thekey-bit as centered in the key-hub 20, and adjacent to said edge facethe metal is cut away to form a second or false radial face 26, whichwould be acted upon by a key whose bit was so short as not to reach theface 25. The second tumbler (shown separately in Fig. 8) is providedwith a similarly-located edge radial face 25 for being acted upon by theflat side of the key, and upon the outer and inner side of said edgeface 25 there are false radial faces, the inner radial face 26 beingsubstantially the same as in the rst tumbler, while the outer radialface 27 stands upon the op- 95 It will thus be seen that the key-bit atthe portion which acts upon thesecond tumbler must be shorter than thatwhich acts upon the first tumbler. The tnmblers are held in their normalposi- IOO tion by springs 28, which springs extend around the post 19,with one end bearing on the inner wall of the case and the other endbearing upon a shoulder of the tumbler. The tumblers are limited intheir movement as actuated by said spring by coming in contact with thepost 17, the tumblers being cut away sufficiently to give them theproper rotary movement without otherwise interfering with said post. Award-plate 29 is placed between the first and second tumblers, and asecond ward-plate 30 is placed over the first tumbler, said plates beingheld in place by the case and the key of course being bitted to permitit to pass said ward-plates. Aportion of each tumbler-spring and aportion of each wardplate extend into the hollow extension 13 of thecase.

The tumbler-springs normally hold the tumblers in the position forlocking. Upon forcing the shackle into place the beveled nose strikesthe end 23 of the tumbler-rims and forces the tumblers back with arotary motion to permit the nose of the shackle to pass the tumblers,after which the tumblers return to their normal position and engage theshoulder 2l, as shown in Fig. l. In unlocking` the shackle with theproper key the fiat sides of the key strike the radial edge faces 25 ofboth tumblers and carry them together into the position to release theshackle. In striking the face 25 of the second tumbler the key-bit mustbe short enough to pass the false face 27 without acting on thetumblers. The space between the opposing ends of the tumbler-rim, as at23 and 24, is but a little wider than is barely necessary to permit thenose of the shackle to pass between them. In case a false key should beemployed in an attempt to open the lock and was long enough to engagethe false face 27 of the first tumbler then said first tumbler would bethrown far enough to lock the shackle on the back shoulder 22 before theother tumbler would be released from the shoulder 21, as illustrated inFig. 2. If a key should be inserted which properly engages one only ofthe edge faces 25 of either tumbler and either false face of the othertumbler, the result would be the same. Various changes may be made inthe radial edge faces of the tnmblers for different keys, and the numberof tumblers may be increased as desired.

It is apparent that some changes from the specific construction hereindisclosed may be made, and therefore I do not wish to be understood aslimiting myself to the precise form of construction shown and described,but desire'the liberty to make such changes in working my invention asmay fairly come within the spirit and scope of the same.

I claim as my inventionl. A iiXed inner circular bearing for the rotarytumblers, in combination with the circular tumblers having the rimportion with opposing ends 23 and 24, and inside of the said rim acentral opening for a key-hub and key with the true and false edgebearing radial faces formed on the walls oi' the said tumbleropening,substantially as described.

2. The combination of the fianged circular case-bodywith the hollowextension 13 correspondingly anged on two side edges and theshackle-bracket secured within the said extension and embraced therebyon its four sides, substantially as described.

3. The combination of the case having the circular body and hollowextension, the tumblers, ward-plates, and tumbler-springs, said springsand Ward-plates being partly extended into said hollow extension of thecase, substantially as described.

HENRY G. VOIGHT.

Witnesses:

T. S. BISHOP, M. S. WIARD.

